396 HYALONEMA (THALLONEMA) GEMINATUM. 
anchor lies on the same side of the shaft as the shortest side of the other. The 
dimensions of a typical amphidise of this kind are: — total length 22 u; thick- 
ness of shaft 1.5 1; length of the longest and shortest parts (sides) of the anchors 
respectively 7.5 « and 4 yw; breadth of anchors 9 yu. 
The nearest allies of the above sponge are Hyalonema (Skianema) aequa- 
toriale and H. (S.) umbraculum described in this Report. From both it is 
distinguished by the possession of large geminate macramphidises and small, 
long-spined canalar pinules, and by other differences in the spiculation. 
